大小没有改变，它们现在开始运动，头碰头相撞。

No change in the Numbers except that they go now head-on.

youdao

长颈鹿用它们的脖子打架，因此在头碰头或脖子撞脖子后，它们最终看上去非常强壮。

Giraffes use their necks to fight, so after going head-to-head - or neck-to-neck - they can end up looking extremely muscular.

youdao

我脑子中一片茫然，掉书和碰头以及现在的一切都让我的头有些发昏。

I was totally dazed. From dropping my book and banging my head and everything.

youdao